Fostex model 80 left tape counter sensor 8251160 000 they often keep their top

they often keep their top level PCB numbers the same in each unit so you need to check if you have the same 5xxxxxxxx number to be sure

Back panel from a Tascam 38 8 track reel to reel machine

Standard 80mm heavy balanced flywheel used in all of the later Teac and Tascam models

but not the Cactus ears or Pacman plastic by the tension arms

Fostex model 80 left tape counter sensor 8251160 000 they often keep their topThis is the actual sensor that sits in the housing of the right hand side. You have to remove the molex plug to get it through looking from the back of the plug lugs up its red white 1 white 2 blue 3 yellow 4 with one starting on the left